Many people confuse the GMT900 (2007–2013) with the GMT800 and GMT400 trucks that used torsion bar front suspension. Here’s an important clarification – and what it means for your leveling options.
The GMT900 Does NOT Use Torsion Bars
The 2007–2013 Silverado and Sierra 1500 (GMT900) uses a coilover-style independent front suspension (IFS) with MacPherson-type struts and a coil spring over the shock absorber. There are NO torsion bars to crank on this platform.
Which Trucks Had Torsion Bars?
- GMT400 (1988–1998): 4WD models used torsion bar front suspension
- GMT800 (1999–2006): 4WD models used torsion bar front suspension
- GMT900 2500HD/3500HD: Some 4WD configurations use a solid front axle (no torsion bars)
Wait – What About the GMT900 2500HD/3500HD?
The heavy-duty GMT900 trucks (2500HD and 3500HD) with 4WD use a solid front axle with coil springs, not torsion bars. You can crank the torsion bar keys on the older GMT800 HDs, but this does NOT apply to GMT900 HDs.
So How Do You Level the GMT900 1500?
To raise the front of a 2007–2013 Silverado/Sierra 1500, you use:
- Strut spacer leveling kit (most common) – sits on top of the strut tower
- Extended strut with longer travel
- Full lift kit with new strut assemblies
Rough Country 2" Leveling Kit – GMT900 1500 (1307) is the go-to option for a factory-style level.
Key Takeaway:
If you’re reading about “torsion bar cranks” on GMT900 trucks online, the information is outdated or confused with GMT800 content. The GMT900 1500 uses struts – level it with a spacer or full strut kit.
Does anyone have questions about the GMT900 suspension setup? Ask below!